$(function () {
    'use strict';

    QUnit.module('affix plugin')

    QUnit.test('should be defined on jquery object', function (assert) {
        assert.expect(1)
        assert.ok($(document.body).affix, 'affix method is defined')
    })

    QUnit.module('affix', {
        beforeEach: function () {
            // Run all tests in noConflict mode -- it's the only way to ensure that the plugin works in noConflict mode
            $.fn.bootstrapAffix = $.fn.affix.noConflict()
        },
        afterEach: function () {
            $.fn.affix = $.fn.bootstrapAffix
            delete $.fn.bootstrapAffix
        }
    })

    QUnit.test('should provide no conflict', function (assert) {
        assert.expect(1)
        assert.strictEqual($.fn.affix, undefined, 'affix was set back to undefined (org value)')
    })

    QUnit.test('should return jquery collection containing the element', function (assert) {
        assert.expect(2)
        var $el = $('<div/>')
        var $affix = $el.bootstrapAffix()
        assert.ok($affix instanceof $, 'returns jquery collection')
        assert.strictEqual($affix[0], $el[0], 'collection contains element')
    })

    QUnit.test('should exit early if element is not visible', function (assert) {
        assert.expect(1)
        var $affix = $('<div style="display: none"/>').bootstrapAffix()
        $affix.data('bs.affix').checkPosition()
        assert.ok(!$affix.hasClass('affix'), 'affix class was not added')
    })

    QUnit.test('should trigger affixed event after affix', function (assert) {
        assert.expect(2)
        var done = assert.async()

        var templateHTML = '<div id="affixTarget">'
            + '<ul>'
            + '<li>Please affix</li>'
            + '<li>And unaffix</li>'
            + '</ul>'
            + '</div>'
            + '<div id="affixAfter" style="height: 20000px; display: block;"/>'
        $(templateHTML).appendTo(document.body)

        $('#affixTarget').bootstrapAffix({
            offset: $('#affixTarget ul').position()
        })

        $('#affixTarget')
            .on('affix.bs.affix', function () {
                assert.ok(true, 'affix event fired')
            }).on('affixed.bs.affix', function () {
            assert.ok(true, 'affixed event fired')
            $('#affixTarget, #affixAfter').remove()
            done()
        })

        setTimeout(function () {
            window.scrollTo(0, document.body.scrollHeight)

            setTimeout(function () {
                window.scroll(0, 0)
            }, 16) // for testing in a browser
        }, 0)
    })

    QUnit.test('should affix-top when scrolling up to offset when parent has padding', function (assert) {
        assert.expect(1)
        var done = assert.async()

        var templateHTML = '<div id="padding-offset" style="padding-top: 20px;">'
            + '<div id="affixTopTarget">'
            + '<p>Testing affix-top class is added</p>'
            + '</div>'
            + '<div style="height: 1000px; display: block;"/>'
            + '</div>'
        $(templateHTML).appendTo(document.body)

        $('#affixTopTarget')
            .bootstrapAffix({
                offset: {top: 120, bottom: 0}
            })
            .on('affixed-top.bs.affix', function () {
                assert.ok($('#affixTopTarget').hasClass('affix-top'), 'affix-top class applied')
                $('#padding-offset').remove()
                done()
            })

        setTimeout(function () {
            window.scrollTo(0, document.body.scrollHeight)

            setTimeout(function () {
                window.scroll(0, 119)
            }, 250)
        }, 250)
    })
})
